Product Review
The Updated Version Power Charger BankCapacity:10400mAh Dimensions: 5.67*2.64*0.6inc Item weight: 0.5lb Rated Energy:38.48Wh 2 x Input ports: Micro USB input (5V/2A); Type-C input (5V/2.6A) 3 x Output ports: USB output 1(5V/3A); USB output 2(5V/3A); Type-C output(5V/3A) Recharging time: Appr 4.5 hours by Type-C port (5V/3A power adapter and 3A charging cable are requested) Recharging time: Appr 6 hours by Micro USB input port (5V/2A power adapter) Package Contents: 1x Charmast power bank, 1x Micro USB cable, 1x Manual, 1x Mesh pouch How to calculate how many times a power bank can charge a phone? Or how to check if a power bank is true correct mah Capacity. The labelled capacity on the power bank x 3.7 / output voltage of the power bank x 0.85 / the battery capacity of the of the drive = total number of charges for the device. Such as iPhone X has a battery size of 2,716mAh, and this power bank, it is 10400mAh capacity. It may charge your iphone x about N times. N= 10400mAh x 3.7 / 5 x 0.85 / 2716mAh = 2.4 times So it may charge iPhone X 2.4 times. Note: you cannot use this formula if you are charging your device with a USB-C PD port in a charging port. This is because the output changes according to the phone's input needs. It's not set like other power banks. However, you can use 5V as a reference.
